Before attempting this mission, it is best to train up the team a little bit before starting on this mission: getting Shadow Blast for Shadowboxer and Shadowport for Darkling could come in handy, as well as making sure the Personality stat is high enough to accomodate more teammates than you already have. After completing mission 2, Tastidian will give you another assignment: to go into the Great Forest, find the energy golem workshop and destroy it. Start out by going to the Great Forest and simply follow the path.